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Vishay General Semiconductor - Diodes Division SMA5J33CHE3/61
- Part No.:
- SMA5J33CHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA5J33CHE3/61.pdf
- Description:
- TVS DIODE 33VWM 59VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,098
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Product details
Overview
SMA5J33CHE3/61 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for high-energy surge protection on signal and power lines. It features a 33 V stand-off voltage (VWM), 36.7–40.6 V breakdown voltage (VBR), 500 W peak pulse power (PPPM), and clamps transients to ≤53.3 V at 9.4 A IPPM - used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMA5J33CHE3/61 datasheet, SMA5J33CHE3/61 pinout, SMA5J33CHE3/61 application, or SMA5J33CHE3/61 equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, 150 °C junction temperature rating, low incremental surge resistance, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates symmetrically in both directions, enabling robust protection of AC-coupled or floating signal paths without polarity constraints. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1.0 ps), critical for suppressing ESD and lightning-induced surges per IEC 61000-4-2/4-5.
The device uses a silicon avalanche structure optimized for low clamping ratio (VC/VBR ≈ 1.38) and thermal stability up to 150 °C. With RθJA = 80 °C/W and RθJL = 25 °C/W, it sustains repetitive surge events when mounted per recommended pad layout and meets MSL Level 1 reflow profile (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 36.7 V / 40.6 V at 1 mA - guaranteed avalanche initiation range under standardized test conditions |
| VC @ IPPM | ≤53.3 V at 9.4 A - clamped voltage during 10/1000 µs surge, defining worst-case overvoltage seen by protected circuit |
| PPPM | 500 W - peak pulse power handling for 10/1000 µs waveform, indicating energy absorption capacity |
| TJ max | +150 °C - maximum junction temperature, supporting operation in under-hood automotive environments |
| Qualification | AEC-Q101 qualified - validated for automotive-grade reliability including temperature cycling and HTRB |
| Package | DO-214AC (SMA) - surface-mount outline with 5.28 mm × 4.50 mm footprint and 2.29 mm height |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with matte tin-plated leads, UL 94 V-0 rated, no polarity marking for bi-directional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (unmarked) | Bi-directional avalanche terminals | Both ends function identically; no cathode band - enables symmetrical clamping on differential or AC lines |
| Case | Non-electrical mechanical interface | Plastic body provides insulation and mechanical anchoring; no thermal or electrical connection to die |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Enables single-device protection of balanced lines (e.g., RS-485, CAN FD) without external polarity management |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules and ADAS sensor interfaces |
| Low clamping ratio (VC/VBR) | ~1.38 - minimizes overvoltage stress on downstream ICs compared to higher-ratio TVS devices |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C peak without moisture-induced damage |
| Glass-passivated junction | Ensures stable leakage current (<1.0 μA) and long-term reliability under thermal cycling |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting analog outputs of pressure/temperature sensors in engine bay environments exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bi-directional TVS clamp absorbing >500 W transient energy while maintaining <53.3 V rail integrity. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V sensor signal conditioning ICs during 12 V system surges. | Use Scenario: Safeguarding PLC digital input channels connected to 24 V DC field wiring subject to inductive switching transients. IC Role / Device Role / Timing Role: Fast-response surge suppressor limiting voltage excursion to ≤53.3 V within nanoseconds of transient onset. Use Value: Eliminates need for discrete RC snubbers and extends mean time between failures in factory automation systems. |
| Telecom Line Interface | Consumer USB Port Protection |
Use Scenario: Shielding Ethernet PHY differential pairs (e.g., 10/100BASE-TX) against ESD and lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Symmetric clamping element placed across transformer secondary windings to shunt surge current to ground. Use Value: Maintains signal integrity by limiting differential-mode overvoltage to <53.3 V while meeting IEC 61000-4-5 Level 3 requirements. | Use Scenario: Adding secondary-level surge immunity to USB 2.0 data lines (D+/D−) in portable audio/video devices. IC Role / Device Role / Timing Role: Low-capacitance bi-directional TVS suppressing contact ESD (±15 kV air, ±8 kV contact) without signal degradation. Use Value: Achieves pass/fail compliance in USB-IF certification testing while preserving 480 Mbps data eye margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA5J33CA-E3/61 | Same VWM (33 V), identical DO-214AC package and AEC-Q101 qualification; differs only in RoHS compliance suffix (E3 vs HE3) | Commercial-grade variant without automotive qualification documentation traceability | Select when AEC-Q101 certification is not required and cost optimization is prioritized |
| SMC5J33CAHE3_A/H | Higher PPPM (1500 W), larger DO-214AB (SMC) package, same VWM and bi-directional functionality | Used where higher surge energy (e.g., 10/1000 µs, 30 A) exceeds SMA5J33CHE3/61's 9.4 A rating | Choose for industrial motor drive I/O requiring >1000 W surge handling and larger thermal mass |
Compared with SMA5J33CHE3/61, SMA5J33CA-E3/61 offers identical electrical performance but lacks AEC-Q101 validation records, while SMC5J33CAHE3_A/H delivers triple the surge power in a physically larger package - making the former suitable for cost-sensitive non-automotive use and the latter for high-energy industrial environments.
Availability
SMA5J33CHE3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line drivers, and consumer USB port protection requiring stable component supply and AEC-Q101-compliant surge immunity.
Supply support for SMA5J33CHE3/61 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability and application-specific optimization.
The SMA5J series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, surface-mount surge protection in automotive, industrial, and communications infrastructure where space-constrained PCB layouts demand robust bi-directional clamping.
FAQ
What is the polarity configuration of SMA5J33CHE3/61?
SMA5J33CHE3/61 is a bi-directional transient voltage suppressor with no polarity marking on the DO-214AC (SMA) package. Both terminals function identically, enabling symmetrical clamping on AC-coupled or differential signal lines without regard to orientation during placement - a key advantage for protecting RS-485, CAN, or Ethernet interfaces.
Is SMA5J33CHE3/61 qualified for automotive applications?
Yes, SMA5J33CHE3/61 is AEC-Q101 qualified, meaning it has passed rigorous stress tests including temperature cycling, highly accelerated life testing (HALT), and surge endurance specific to automotive electronic modules. This qualification confirms its suitability for under-hood and chassis-mounted applications where ambient temperatures reach +125 °C and transient threats exceed ISO 7637-2 Pulse 5a.
What is the maximum clamping voltage of SMA5J33CHE3/61 under surge conditions?
The maximum clamping voltage (VC) of SMA5J33CHE3/61 is 53.3 V at a peak pulse current (IPPM) of 9.4 A, measured using the standard 10/1000 µs double-exponential waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case surge events and is critical for ensuring compatibility with 3.3 V or 5 V logic interfaces downstream.
How does SMA5J33CHE3/61 differ from uni-directional variants like SMA5J33AHE3/61?
SMA5J33CHE3/61 is bi-directional with no cathode band and symmetric VBR/VWM characteristics in both directions, whereas SMA5J33AHE3/61 is uni-directional, featuring a cathode band and forward conduction capability (VF = 3.5 V at 25 A). The bi-directional version is used on floating or AC lines; the uni-directional version suits DC power rail protection where forward current handling is needed.
What PCB layout guidance applies to SMA5J33CHE3/61 for optimal thermal performance?
For optimal thermal performance, SMA5J33CHE3/61 must be mounted on minimum recommended copper pads: 0.2" × 0.2" (5.0 mm × 5.0 mm) per terminal, per Vishay datasheet Fig. 2 derating curves. Using smaller pads reduces heat dissipation, causing premature thermal runaway during repetitive surges - especially critical in automotive and industrial applications where ambient temperatures exceed 85 °C.
SMA5J33CHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 59V
- Current - Peak Pulse (10/1000µs):
- 8.5A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA5J33CHE3/61 FAQ
1.How can I place an order for SMA5J33CHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA5J33CHE3/61 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMA5J33CHE3/61 reliable?
The price and inventory of SMA5J33CHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA5J33CHE3/61 is usually 5 days.
3.What payment methods are accepted for SMA5J33CHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA5J33CHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA5J33CHE3/61?
SMA5J33CHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA5J33CHE3/61 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMA5J33CHE3/61?
For technical support, including SMA5J33CHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA5J33CHE3/61 requirements.
6.How does Aetrix verify that SMA5J33CHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMA5J33CHE3/61 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMA5J33CHE3/61 meets industry standards.
7.What is the process for return or replacement of SMA5J33CHE3/61?
All SMA5J33CHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMA5J33CHE3/61, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMA5J33CHE3/61 part is unused and in its original packaging.
Return procedure for SMA5J33CHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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